        

              viewer.setViewStyle({style:"outline"});
              $.get('data/1fas.pqr', function(data){
                  viewer.addModel(data, "pqr");
                  $.get("data/1fas.cube",function(volumedata){
                      viewer.addSurface($3Dmol.SurfaceType.VDW, 
                          {opacity:0.85,
                          voldata: new $3Dmol.VolumeData(volumedata, "cube"), 
                          volscheme: new $3Dmol.Gradient.RWB(-10,10)},
                          {}).then(function(surfid){
                              viewer.zoomTo(); //just for testing
                              viewer.render(callback);
                          });
                  });
              });
         

